Extended/Updated tests for PHONE_NUMBERS_EQUAL

Changes aligned with external/sqlite (PhoneNumberUtils and
OldPhoneNumberUtils).

- Added tests for two digit trunk cases in Hungary, Mexico and
Mongolia which now match correctly (loose matching only)
- Added tests to ensure that when comparing local numbers with
international numbers we don't ignore the first digit of the area
code of the local number assuming it to be a trunk digit

Test: Ran DatabaseGeneralTest successfully

Bug: 63179537
Bug: 63178542
Bug: 62916088

Change-Id: I8726fd5e238033e3462f447cd3cebc0add8611a9